Digital Arsenal
Flatbuffers

import { ByteBuffer } from 'flatbuffers';
import { Monster } from './monster_generated';

// Assume `buffer` contains multiple size-prefixed FlatBuffer messages
const data = new Uint8Array(buffer);
const messages: Monster[] = [];
let offset = 0;

// Read entire buffer of messages
while (offset < data.length) {
  const size = new DataView(data.buffer, offset).getUint32(0, true);
  const bb = new ByteBuffer(data.slice(offset + 4, offset + 4 + size));
  messages.push(Monster.getRootAsMonster(bb));
  offset += 4 + size;
}

// Read latest message (last in buffer)
function getLatestMessage(data: Uint8Array): Monster {
  let offset = 0;
  let lastOffset = 0;
  while (offset < data.length) {
    lastOffset = offset;
    const size = new DataView(data.buffer, offset).getUint32(0, true);
    offset += 4 + size;
  }
  const size = new DataView(data.buffer, lastOffset).getUint32(0, true);
  const bb = new ByteBuffer(data.slice(lastOffset + 4, lastOffset + 4 + size));
  return Monster.getRootAsMonster(bb);
}

// Read arbitrary indexed message
function getMessageAtIndex(data: Uint8Array, index: number): Monster | null {
  let offset = 0;
  let currentIndex = 0;
  while (offset < data.length) {
    const size = new DataView(data.buffer, offset).getUint32(0, true);
    if (currentIndex === index) {
      const bb = new ByteBuffer(data.slice(offset + 4, offset + 4 + size));
      return Monster.getRootAsMonster(bb);
    }
    offset += 4 + size;
    currentIndex++;
  }
  return null;
}

import (
    "encoding/binary"
    flatbuffers "github.com/google/flatbuffers/go"
    "myapp/Monster"
)

// Read entire buffer of messages
func ReadAllMessages(data []byte) []*Monster.Monster {
    var messages []*Monster.Monster
    offset := 0
    for offset < len(data) {
        size := binary.LittleEndian.Uint32(data[offset:])
        msg := Monster.GetRootAsMonster(data[offset+4:offset+4+int(size)], 0)
        messages = append(messages, msg)
        offset += 4 + int(size)
    }
    return messages
}

// Read latest message
func GetLatestMessage(data []byte) *Monster.Monster {
    offset := 0
    lastOffset := 0
    for offset < len(data) {
        lastOffset = offset
        size := binary.LittleEndian.Uint32(data[offset:])
        offset += 4 + int(size)
    }
    size := binary.LittleEndian.Uint32(data[lastOffset:])
    return Monster.GetRootAsMonster(data[lastOffset+4:lastOffset+4+int(size)], 0)
}

// Read arbitrary indexed message
func GetMessageAtIndex(data []byte, index int) *Monster.Monster {
    offset := 0
    currentIndex := 0
    for offset < len(data) {
        size := binary.LittleEndian.Uint32(data[offset:])
        if currentIndex == index {
            return Monster.GetRootAsMonster(data[offset+4:offset+4+int(size)], 0)
        }
        offset += 4 + int(size)
        currentIndex++
    }
    return nil
}

import struct
from Monster import Monster

def read_all_messages(data: bytes) -> list:
    """Read entire buffer of messages."""
    messages = []
    offset = 0
    while offset < len(data):
        size = struct.unpack('<I', data[offset:offset+4])[0]
        msg = Monster.Monster.GetRootAs(data[offset+4:offset+4+size], 0)
        messages.append(msg)
        offset += 4 + size
    return messages

def get_latest_message(data: bytes):
    """Read the latest (last) message in the buffer."""
    offset = 0
    last_offset = 0
    while offset < len(data):
        last_offset = offset
        size = struct.unpack('<I', data[offset:offset+4])[0]
        offset += 4 + size
    size = struct.unpack('<I', data[last_offset:last_offset+4])[0]
    return Monster.Monster.GetRootAs(data[last_offset+4:last_offset+4+size], 0)

def get_message_at_index(data: bytes, index: int):
    """Read arbitrary indexed message."""
    offset = 0
    current_index = 0
    while offset < len(data):
        size = struct.unpack('<I', data[offset:offset+4])[0]
        if current_index == index:
            return Monster.Monster.GetRootAs(data[offset+4:offset+4+size], 0)
        offset += 4 + size
        current_index += 1
    return None

use flatbuffers;
use crate::monster_generated::Monster;

/// Read entire buffer of messages
fn read_all_messages(data: &[u8]) -> Vec<Monster> {
    let mut messages = Vec::new();
    let mut offset = 0;
    while offset < data.len() {
        let size = u32::from_le_bytes(data[offset..offset+4].try_into().unwrap()) as usize;
        let msg = flatbuffers::root::<Monster>(&data[offset+4..offset+4+size]).unwrap();
        messages.push(msg);
        offset += 4 + size;
    }
    messages
}

/// Read latest message
fn get_latest_message(data: &[u8]) -> Option<Monster> {
    let mut offset = 0;
    let mut last_offset = 0;
    while offset < data.len() {
        last_offset = offset;
        let size = u32::from_le_bytes(data[offset..offset+4].try_into().unwrap()) as usize;
        offset += 4 + size;
    }
    let size = u32::from_le_bytes(data[last_offset..last_offset+4].try_into().unwrap()) as usize;
    flatbuffers::root::<Monster>(&data[last_offset+4..last_offset+4+size]).ok()
}

/// Read arbitrary indexed message
fn get_message_at_index(data: &[u8], index: usize) -> Option<Monster> {
    let mut offset = 0;
    let mut current_index = 0;
    while offset < data.len() {
        let size = u32::from_le_bytes(data[offset..offset+4].try_into().unwrap()) as usize;
        if current_index == index {
            return flatbuffers::root::<Monster>(&data[offset+4..offset+4+size]).ok();
        }
        offset += 4 + size;
        current_index += 1;
    }
    None
}

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.ArrayList;
import java.util.List;
import Monster;

public class StreamingReader {
    // Read entire buffer of messages
    public static List<Monster> readAllMessages(byte[] data) {
        List<Monster> messages = new ArrayList<>();
        int offset = 0;
        while (offset < data.length) {
            int size = ByteBuffer.wrap(data, offset, 4)
                .order(ByteOrder.LITTLE_ENDIAN).getInt();
            ByteBuffer bb = ByteBuffer.wrap(data, offset + 4, size);
            messages.add(Monster.getRootAsMonster(bb));
            offset += 4 + size;
        }
        return messages;
    }

    // Read latest message
    public static Monster getLatestMessage(byte[] data) {
        int offset = 0;
        int lastOffset = 0;
        while (offset < data.length) {
            lastOffset = offset;
            int size = ByteBuffer.wrap(data, offset, 4)
                .order(ByteOrder.LITTLE_ENDIAN).getInt();
            offset += 4 + size;
        }
        int size = ByteBuffer.wrap(data, lastOffset, 4)
            .order(ByteOrder.LITTLE_ENDIAN).getInt();
        ByteBuffer bb = ByteBuffer.wrap(data, lastOffset + 4, size);
        return Monster.getRootAsMonster(bb);
    }

    // Read arbitrary indexed message
    public static Monster getMessageAtIndex(byte[] data, int index) {
        int offset = 0;
        int currentIndex = 0;
        while (offset < data.length) {
            int size = ByteBuffer.wrap(data, offset, 4)
                .order(ByteOrder.LITTLE_ENDIAN).getInt();
            if (currentIndex == index) {
                ByteBuffer bb = ByteBuffer.wrap(data, offset + 4, size);
                return Monster.getRootAsMonster(bb);
            }
            offset += 4 + size;
            currentIndex++;
        }
        return null;
    }
}

using FlatBuffers;
using System;
using System.Collections.Generic;

public static class StreamingReader
{
    // Read entire buffer of messages
    public static List<Monster> ReadAllMessages(byte[] data)
    {
        var messages = new List<Monster>();
        int offset = 0;
        while (offset < data.Length)
        {
            int size = BitConverter.ToInt32(data, offset);
            var bb = new ByteBuffer(data, offset + 4);
            messages.Add(Monster.GetRootAsMonster(bb));
            offset += 4 + size;
        }
        return messages;
    }

    // Read latest message
    public static Monster GetLatestMessage(byte[] data)
    {
        int offset = 0;
        int lastOffset = 0;
        while (offset < data.Length)
        {
            lastOffset = offset;
            int size = BitConverter.ToInt32(data, offset);
            offset += 4 + size;
        }
        int lastSize = BitConverter.ToInt32(data, lastOffset);
        var bb = new ByteBuffer(data, lastOffset + 4);
        return Monster.GetRootAsMonster(bb);
    }

    // Read arbitrary indexed message
    public static Monster? GetMessageAtIndex(byte[] data, int index)
    {
        int offset = 0;
        int currentIndex = 0;
        while (offset < data.Length)
        {
            int size = BitConverter.ToInt32(data, offset);
            if (currentIndex == index)
            {
                var bb = new ByteBuffer(data, offset + 4);
                return Monster.GetRootAsMonster(bb);
            }
            offset += 4 + size;
            currentIndex++;
        }
        return null;
    }
}

import FlatBuffers

class StreamingReader {
    // Read entire buffer of messages
    static func readAllMessages(data: Data) -> [Monster] {
        var messages: [Monster] = []
        var offset = 0
        while offset < data.count {
            let size = data.withUnsafeBytes { ptr in
                ptr.load(fromByteOffset: offset, as: UInt32.self).littleEndian
            }
            let slice = data[offset+4..<offset+4+Int(size)]
            var bb = ByteBuffer(data: slice)
            messages.append(Monster.getRootAsMonster(bb: &bb))
            offset += 4 + Int(size)
        }
        return messages
    }

    // Read latest message
    static func getLatestMessage(data: Data) -> Monster? {
        var offset = 0
        var lastOffset = 0
        while offset < data.count {
            lastOffset = offset
            let size = data.withUnsafeBytes { ptr in
                ptr.load(fromByteOffset: offset, as: UInt32.self).littleEndian
            }
            offset += 4 + Int(size)
        }
        let size = data.withUnsafeBytes { ptr in
            ptr.load(fromByteOffset: lastOffset, as: UInt32.self).littleEndian
        }
        let slice = data[lastOffset+4..<lastOffset+4+Int(size)]
        var bb = ByteBuffer(data: slice)
        return Monster.getRootAsMonster(bb: &bb)
    }

    // Read arbitrary indexed message
    static func getMessageAtIndex(data: Data, index: Int) -> Monster? {
        var offset = 0
        var currentIndex = 0
        while offset < data.count {
            let size = data.withUnsafeBytes { ptr in
                ptr.load(fromByteOffset: offset, as: UInt32.self).littleEndian
            }
            if currentIndex == index {
                let slice = data[offset+4..<offset+4+Int(size)]
                var bb = ByteBuffer(data: slice)
                return Monster.getRootAsMonster(bb: &bb)
            }
            offset += 4 + Int(size)
            currentIndex += 1
        }
        return nil
    }
}